A device used to prevent the pressure rise of a pressure vessel to a predetermined maximum pressure when it is in an emergency or abnormal condition.

2. action performance and batch test

An experiment to determine the operational performance and actual discharge capacity of the pneumatic control valve release device.

3. in test

An experiment in which the pneumatic regulating valve is installed on the system to protect the system, using the system pressure alone or in conjunction with the use of an auxiliary opening or other pressure source to determine some or all of its working characteristics.

4.Pressure test on workbench

Experiments were carried out on a pressurized system to determine the setting pressure of the pneumatic control valve and closing the seal.